Elevator



(No Model.)

G C. HOWARD.

BLBVATOR. No. 302,490. Patented July 22,1884.

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UNHED STATES PATENT OEEicE.

GEORGE O.l HOWARD, OF PHILADELPHIA, PENNSYLVANIA.

ELEvAToR.

SPECIFICATION forming part of Letters Patent No.'302,490, dated July 22,1884.

Application Iiled January 16, 1884. (No model.)

1"0 all whom, it may concern:

Be it known that I, GEO. O. HOWARD, a citizen of the United States,residing at Philadelphia, Pennsylvania, have invented certainImprovements in Elevators, of which the following is a speciiieation.

My invention relates to an improvement in elevators in whichfriction-clutches are used to hold the rope-wheel at each pull of therope, and also to act as a safety catch or brake if the car of an'elevator' should run more rapidly than the machine is adjusted for,whether occasioned by a careless operator or the break'- ing of any partof the machinery or ropes. I attain these objects by the mechanismillus'- trated in the accompanyingv drawings, in which- Figure l is aplan showing a part of a ropewheel, vA, clutch B in contact with thewheelshaft O, on which clutch B and lever D turn. E is an ear with anelongated slot, through which lever D Works freely, allowing clutch B tocome in contact with the rim of the wheel, thus holding the load beinglifted.

Fig. 2 is an elevation to more clearly show the various parts, similarletters being used in both views, having referred to A B O D E underFig. l; F is the brake; G, the circle over which the brake-rope passes;H, the brake-rope; I, the balance attached to lever D; J, balance-weightat end of brake-rope. K is the car. K"is the rope connecting car withdrum K, L, guides and case for safetyclutches.

Fig. 3 is a plan of guide and case enlarged, and Fig. 4 an elevation. Nis the case and guide flanges. O is a projecting liange forstrengthening the case, and also answers to bolt the ease to the underside of the car. P is the sector, with side pieces connecting it to aboss,`against which it presses when in action, a boss between the sidepieces answering as a nut for the set-screws S. Q is the lines in Fig. 2show the clutch away from the pulley, the friction-brake in contact withrim for lowering. The full lines show the clutch in contact with the rimwhen hoisting. The i'ull lines in Fig. 4 show the clutch as it lies whenthe car is moving at a slow speed, the dotted lines as it will be whenthe car moves at a too rapid speed, being lifted into contact with postM by the friction-piece Q.

As clutches have been used before in various machines, I do not make aclaim for the principle; but

What I do claim as my invention, and desire to secure by Letters Patent,is

1. The combination of a brake and clutch,

vwith a slot in the actuating-boss longer than 4E. The friction piece orpieces bearing against a wheel or guide for the purpose of bringing aclutch or brake into contact with a wheel or guide to stop or controlthe speed of a nioving body, substantially as described.

GEO. O. HOVARD.

Witnesses:

JOHN M. Howmn, JAMES M. DAVENPORT.

